Arc-lamp headlight.



l u@ MMU uumuuqgrm Patented Feb. 2, 1909.

2 SHEETS-SHEET 1.

witnesses atto?, nu#

B. B. LACY.

.ARC LAMP HEDLIGHT. APPLIOATION FILED 51.112124, 1907.

911,409. V Patented Fem, 1909.

2 SHEETS-SHEET 2.

unirme STATES PATENT ionnrcn'.,

BENJAMIN B. LACY, OF HOUSTON, TEXAS, ASSIGNOR, BY. MESNE ASSIGNMENTS, TO ANDERSON-LACY ELECTRIC HE'ADLIGHT COMPANY, A CORPORATION OF TEXAS.

HEADLIGHT.

TNO. 91 1,409.

.PatentedFeb.- 2, 1909.

Application filed September 24,1907. "SerialNm 394,843.

=To 'all whom it mayA concern:

'Bet l"known that I, BENJAMIN B. '.LAcY, a citizen of the United States, 'residing at vHouston,=in` the county of Harris and 'State of Texas,I have invented certain new and useful Improvements in Arc-Lamp Headlighta ot-which the following is aspecication.

'My invention relates to arc Ilamps designed for use in headlights for locomotives, automobiles and vessels "of various kinds, Va-ndhasfor;its object to produce `a construction which will maintain 'astea'dy and unfailing light, notwithstanding the joiting and vibration to ywhich it may i be subjected i`n use, and will 'maint/ain' theluminous arc'in the focal point' of the 4v'reiiector during long runs.

My invention consists lin certain novel features of construction of the -means through-'whi-chthecarbonisf'grip ed to lift it -in springing the larc and -t e means Atlfnough wbich'the' electro-magnetA exerts its ,pull'upon the -carbon'liftin'g means, allof which be' hereinafter fullyy described and tail,l plan View o'f the lifting leve particularly pointed out.

I lthe accompanying drawings, Figures vlf'and 2.are elevations of the improved lamp, Fig. `.1showing'thelampfas-seenromthe left' off'Fig.`-2,f and'Fig. 2lsh-owingthe lamp as seen'fromfthefright ofFig.` 1. Fig. '-3 isade- Fig.v 4 a detailplan view fthel clutch through which the'earbon-isf gripped.

f1=re esents'a'post projecting from any -suitab e-base,and 2'is asocketZ loosely fitting 'saidl post,f-'so -as to; be not onlyverticallyv adustable thereon, butj to* permit slight anguar adjustment of the' lamp.

@represents a set screw forfixi'ng'the` vertical adjustment and 4 'represents a lifting -screwgpassing through the arm 2a andlocked to itsfadjustment by Ia jam-nut 4-soas to determine the angular position'of the lamp onfits'loasel The post and-socket are circuiar ini'erosssection and thus admit of adjustment by' limitedrotation.

The-'angular'adjustment of the lamp upon its base'is obtained'by rotating the socket' 2 'on' the post 1. At'thesame' tlmethel vertical adjustment of the'lamp'm-ay besecured byTaisingfor loweringthe socket upon the post. For' this pm 'plosef the lifting screwili' is adapted'to-adjust t e vertical height. rvThe desired adjustment having-been-'securedfthe -set`v screw *3 is screwed in 'tightyagainst the post-1 to maintain' the adjustment.

l 5 represents astandard or upright deiiect-eo. .at its upper end' to rovideI-a horizontal-arm f5.

l7 represents a" uwer-horizontal arm A proj e'eting from4 the: upright 5.

portedl respectively from the'` upper arm/a/n'd the lower arm 7. Theupper electrode'is of carbon ,f the lower electrode-is of metal. By making the u per-electrode-of carbon, Ifretain all the -a vantages 'of'a carbon electrode lamp. By making the A-l'oWer electrode of metal (preferably-copper), I avoid the disadvantages due to wearing away of the lower `electrode and lowering ofthe position of' the arc; also do away'with spittingnt'times'or iiuctuation in light; vand the lampisV adapted for the long runs without' adjustment.

The use of-means for varying "the lengths of the arms 6 land 7 for the purpose f2 bringing the -arc X into coincidencef-with'thefocal center of a reflector in connection with which the lamp is to-be used,'is'made unnecessary since such a'djustmentmaybeaccom lished roughly' by shifting the; posit f 1 or the? ase.

The upper arm 6 carries 'a 'Thead -1'0 upon which is mounted the vertical-slide track 11' for theup ver carbon. The upper carbon is mounts' 'upion --side track' `11'1 throughthe medium ofa-clip'llsuch for in- 'stance,-as disclosed in eXpiredLe-ttersf'Pa-tent No.-"422,446,' rantedMarchf1th,1890. lclipireceives gghe upper endfof'the'carbon, `as

8is consumed.V

14 represents thesOle'nDi'd, whose winding is inseries with the lamp, circuitandfwhose core or armatureflfis connected--with-mdl which connectsfat "17twith-the 'lever 18,"ui-

,shown invFig. 2 and'islprovided'iwithfembracing lugs 13 Iwhich'permit 'the-'clip to slide downward onthe' track'il as theearbon crumed at 19 and-engaging at 520'with J'the 40 lished to repeat the operation.

24 re resents a guide for the carbon 8 which a so serves as a rest for the clutch23 to bring the clutch intoy position transverse to the carbon for the purpose explained. While the point 22 of connection between the rod 21 and the clutch 23 is eccentric to the carbon, and therefore has a tendency of the spfring 28 to raise the lrod 25 relatively f to the ting rod 21 and cause the grip to clutch. The upper 'end of rod 25 is ypreferably guided upon the rod 21 and for this purpose and for 'the convenient forming of, the

upper movable abutment for spring 28, said upper end of rod 25 is bent inward and fashioned as shown to provide an eye through which rod 21 passes.

It will be understood that the lamp, as thus far described, operates on the well know'n principle of having the carbons separated by the pull of the solenoid '14 on its core 15 until the weakening of the current incident to the swinging of the arc, establishes a'balance between the parts; the weakening of the pull due to the wearing away of the upper carbon andthe enlargement of the space, permitting the carbon to drop with its'clutch until the latter engages the rest 24 when the clutch is released, the carbon slides downward to make av new contact with the lower carbon and the circuit is a ain estabhe spring 28 for raising the canting-rod 25 isl of course selected with relation to the weight of the parts imposed upon the point of the clutch 23 as it contacts with the rest 24, so as to permit the clutch to turnupon its pivot 22 in opposition to said spring.

In order to steady the movement of the lever under the pull of the-solenoid and the inertia of the loads imposed upony the resl ective ends of the lever 18, the pull of the so enoid is opposed by a spring 30 adjustably suspended at 31 and connected at4 32 with Ithe yoke 33 which has slot`and pinbearings 34 on the bracket 35 projecting from the'uprig-pit 5 and connects at 36 with the core 15; wV e the bracket 35 carries the lunger 37 of the dash-pot F38, the cylindrica member' of which is connected at 39,with the lower arm of the yoke 33. Thus, the solenoid is not onlyropposed by' the constant pull of the Spring 30, which may be regulated atfwill by adjus its up er end, but sudden movements o the so enoid arevprevented by the dash-pot. Yoke 33 serves' also as the means Ithrough which to connect the rod 16 with the core 15, such connection being shown at 40. The spring 30' also balances the weight of the v parts sustained by the rod 16 andsince its resistance increases with its distention, its steadying effect, after the ,carbons are separated, islexerted to the best advantage.

Having thus described my invention, what I claim and desire to secure by Letters Patent is: v

1.l In a lifting device for arc lamps, the combination with an electrically operatedlifting rod; of a clutch ivotally connected intermediately of its endg to one end of said lifting rod'; a canting lever pivotally connected at one end of the clutc and provided at its other end with a bent portion ada ted to slidably en age the lifting rod; a co ar rigidly secure to said lifting rod; and a spring mounted on the lifting rod between the colf lar and the bent portion of said canting lever Whereby'when the lifting rod is operated, the clutch is oscillatedl upon said lifting rod.

2. In an arc lam the combination with the standard provi ed with an upper and a lower horizontal arm; of a lever pivotally mounted intermediately of its ends, upon the .up er arm of said standard; a clutch-lifting ro pivotally connected to one end of sai lever; a rod depending by one end from the other end of said lever; a yoke connected with the other end of said de ending lever; a guide upon which said yoke's 'des a dash pot com rising two members one of which is fixe to the standard and the otheri of which is connected to the yoke, carried on said yoke v and having its axis in the same vertical 1plane as-the depending rod; a solenoid rigid ysecured to said standard; an armature dependin from the' yoke and connected with said so enoid'g and a spring for sup orting the yoke and the parts mounted on tJ e yoke.

v3. In an/electric headlight, the-combination with `the standard; of a lever ivoted at its middle point .upon said standar a clutchlifting rod suspended from one end of said lever; an operating rod depending from the other 'end of said lever; a solenoid rigidly mounted on saidl standard; a bracket mountedxupon the standard above the solenoid; av

yoke slidbly mounted upon said bracket; an armature, for said solenoid, depending'i'rom said yoke; aspring secured to a part rigid with the standard, said spring acting to support the weight of the yoke andthose parts sup orted by said yoke; a piston mounted on saidp bracket and a dash-pot mounted on the,

yoke and iitting over said piston, said dash- Y pot and piston acting to re ate the movement of thelyokeunder t e action of the spn'npnd the solenoid. Y

4. an electric headlight, the combination with a standard ha an upper and a lower arm; a solenoid rigi y secured to 'said :standard adjacent to said'lowei' arm; a

spnndg depending from a part ngld with sald piston to regulate the movement oi said stan ard and a jacent to said upper,arm; a yoke; and a rod for actuating the carbonbracket rigidly mounted on said standard inclutching mechanism. Y l termediately of said up er and lower arms-g a The foregoing specification signed at Hons-- 5 yoke slidably mounte upon said bracket ton, Texas this twenty third day of July, 15

and suspended from said spring; an armature 1907. within said solenoid, said armature bein BENJAMIN B. LACY;

` suspended from said yoke; a piston carrie In presenceo two Witnesses:

by said bracket; a dash-potl mounted upon O. J. ANDREWS,Y

10 said yoke and adapted to interact with said CRAs. H. Kerima. 

